Real time control during multikilowatt CO2 laser surface treatments is required to improve reproducibility, to simplify applications to complex geometry workpieces and to deal with every kind of unsteady situations. An automatic strategy was chosen, using linearization around current points to solve non linear problems. Application to laser self quenching is then detailed, experimental setup and complete closed loop are described. Experimental results of the closed loop are finally exposed. Regulation robustness using power or speed command is show against geometrical perturbations. Another regulator was applied to insure temperature cycles to non moving 10x10x1 mm3 samples in controlled atmosphere chamber during titanium nitriding studies.

Date Published: 1 February 1991
PDF: 4 pages
Proc. SPIE 1397, 8th Intl Symp on Gas Flow and Chemical Lasers, (1 February 1991); doi: 10.1117/12.25949

Published in SPIE Proceedings Vol. 1397:
8th Intl Symp on Gas Flow and Chemical Lasers
Concepcion Maroto Domingo; Jose M. Orza, Editor(s)